package cs2340.g21.wms;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;

/**
 * A class that displays a register screen to the user
 * @author Alexander
 * @version 1.14
 */
public class RegisterActivity extends WMSActivity {

    private static final String LOG_TAG = "debugger";

	public static final String EXTRA_EMAIL = "com.example.android.authenticatordemo.extra.EMAIL";
	
	private Coordinator coordinator;
	private UserRegisterTask mRegTask = null;
	
	//Values for text fields
    private String mEmail;
    private String mPassword;
    private String mPasswordConfirm;

    //UI elements
    private EditText mEmailView;
    private EditText mPasswordView;
    private EditText mPasswordConfirmView;
    private View mRegisterFormView;
    private View mRegisterStatusView;
    private TextView mRegisterStatusMessageView;
	

    /**
     * Sets up this activity by receiving the coordinator and adding listeners to
     * buttons and fields
     */
	protected void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
        if(getIntent().getExtras() != null){
            //Log.i(LOG_TAG, "old coord");
            coordinator = (Coordinator) getIntent().getSerializableExtra("cs2340.g21.wms.coordinator");
        }
	    if(coordinator == null){
	        //Log.i(LOG_TAG, "new coord");
	        coordinator = new Coordinator();
	    }
	    
	    setContentView(R.layout.activity_register);
	
	    // Set up the login form.
	    mEmail = getIntent().getStringExtra(EXTRA_EMAIL);
	    mEmailView = (EditText) findViewById(R.id.email);
	    mEmailView.setText(mEmail);
	
	    mPasswordView = (EditText) findViewById(R.id.password);
	    mPasswordConfirmView = (EditText) findViewById(R.id.confirmPassword);
	    /*mPasswordView
	            .setOnEditorActionListener(new TextView.OnEditorActionListener() {
	                @Override
	                public boolean onEditorAction(TextView textView, int id,
	                        KeyEvent keyEvent) {
	                    if (id == R.id.register || id == EditorInfo.IME_NULL) {
	                        attemptRegister();
	                        return true;
	                    }
	                    return false;
	                }
	            });*/
	
	    mRegisterFormView = findViewById(R.id.register_form);
	    mRegisterStatusView = findViewById(R.id.register_status);
	    mRegisterStatusMessageView = (TextView) findViewById(R.id.register_status_message);
	
	    //added
	    /*findViewById(R.id.password).setOnFocusChangeListener(
	    		new View.OnFocusChangeListener() {
					@Override
					public void onFocusChange(View v, boolean hasFocus) {
						if (!hasFocus) {
							mEmailView.setError(null);
							mEmail = mEmailView.getText().toString();
							if (!mEmail.matches("[a-z/.0-9]+@[a-z0-9]+.(com|gov|edu|net|ru)") || !coordinator.checkEmailAvailable(mEmail))
								mEmailView.setError(getString(R.string.error_invalid_email));
						};
					}
				});*/
	    //
	    findViewById(R.id.submit_button).setOnClickListener(
	            new View.OnClickListener() {
	                @Override
	                public void onClick(View view) {
	                    attemptRegister();
	                }
	            });
	    findViewById(R.id.cancel_button).setOnClickListener(
	            new View.OnClickListener() {
	                @Override
	                public void onClick(View view) {
                        Intent intent = new Intent();
                        intent.putExtra("cs2340.g21.wms.coordinator", coordinator);
                        intent.setClass(RegisterActivity.this, LoginActivity.class);
                        startActivity(intent);
                        finish();
	                }
	            });
	}
	
	
	protected void attemptRegister() {
	    if (mRegTask != null) {
            return;
        }

        // Reset errors.
        mEmailView.setError(null);
        mPasswordView.setError(null);

        // Store values at the time of the register attempt.
        mEmail = mEmailView.getText().toString();
        mPassword = mPasswordView.getText().toString();
        mPasswordConfirm = mPasswordConfirmView.getText().toString();

        boolean cancel = false;
        View focusView = null;

        // Check for a valid password.
        if (TextUtils.isEmpty(mPassword)) {
            mPasswordView.setError(getString(R.string.error_field_required));
            focusView = mPasswordView;
            cancel = true;
        } else if (mPassword.length() < 4) {
            mPasswordView.setError(getString(R.string.error_invalid_password));
            focusView = mPasswordView;
            cancel = true;
        } else if (!mPassword.equals(mPasswordConfirm)){
            mPasswordConfirmView.setError(getString(R.string.error_passwordconfirm));
            focusView = mPasswordConfirmView;
            cancel = true;
        }

        // Check for a valid email address.
        if (TextUtils.isEmpty(mEmail)) {
            mEmailView.setError(getString(R.string.error_field_required));
            focusView = mEmailView;
            cancel = true;
        } else if (!mEmail.matches("[a-z/.0-9]+@[a-z0-9]+.(com|gov|edu|net|ru)") || !coordinator.checkEmailAvailable(mEmail)) {
            mEmailView.setError(getString(R.string.error_invalid_email));
            focusView = mEmailView;
            cancel = true;
        }

        if (cancel) {
            // There was an error; don't attempt login and focus the first 
            // form field with an error.
            focusView.requestFocus();
        } else {
            // Show a progress spinner, and kick off a background task to
            // perform the user register attempt.
            mRegisterStatusMessageView.setText(R.string.process_register_account);
            showProgress(true);
            mRegTask = new UserRegisterTask();
            mRegTask.execute((Void) null);
        }
	}
    /**
     * Shows the progress UI and hides the login form.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
    private void showProgress(final boolean show) {
        // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
        // for very easy animations. If available, use these APIs to fade-in
        // the progress spinner.
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
            int shortAnimTime = getResources().getInteger(
                    android.R.integer.config_shortAnimTime);

            mRegisterStatusView.setVisibility(View.VISIBLE);
            mRegisterStatusView.animate().setDuration(shortAnimTime)
                    .alpha(show ? 1 : 0)
                    .setListener(new AnimatorListenerAdapter() {
                        @Override
                        public void onAnimationEnd(Animator animation) {
                            mRegisterStatusView.setVisibility(show ? View.VISIBLE
                                    : View.GONE);
                        }
                    });

            mRegisterFormView.setVisibility(View.VISIBLE);
            mRegisterFormView.animate().setDuration(shortAnimTime)
                    .alpha(show ? 0 : 1)
                    .setListener(new AnimatorListenerAdapter() {
                        @Override
                        public void onAnimationEnd(Animator animation) {
                            mRegisterFormView.setVisibility(show ? View.GONE
                                    : View.VISIBLE);
                        }
                    });
        } else {
            // The ViewPropertyAnimator APIs are not available, so simply show
            // and hide the relevant UI components.
            mRegisterStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
            mRegisterFormView.setVisibility(show ? View.GONE : View.VISIBLE);
        }
    }

    /**
     * Represents an asynchronous login/registration task used to authenticate
     * the user.
     */
    public class UserRegisterTask extends AsyncTask<Void, Void, Boolean> {
        @Override
        protected Boolean doInBackground(Void... params) {
            
            if(coordinator.checkEmailAvailable(mEmail)){
                coordinator.addAccount(mEmail, mPassword);
                return true;
            }
            
            return false;
            /*try {
                // Simulate network access.
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                return false;
            }*/

        }

        @Override
        protected void onPostExecute(final Boolean success) {
            mRegTask = null;
            showProgress(false);

            if (success) {
                Intent intent = new Intent();
                intent.putExtra("cs2340.g21.wms.coordinator", coordinator);
                intent.setClass(RegisterActivity.this, LoginActivity.class);
                startActivity(intent);      
                finish();
            } else {
                mPasswordView
                        .setError(getString(R.string.error_incorrect_password));
                mPasswordView.requestFocus();
            }
        }

        @Override
        protected void onCancelled() {
            mRegTask = null;
            showProgress(false);
        }
    }
    
    protected void onPause(){
        super.onPause(coordinator);
    }
}